:root{
  --bg:#f6f7f9; --panel:#ffffff; --text:#1f2328; --muted:#667085; --line:#e6e8ec; --hover:#f1f3f6;
  --accent:#1d4ed8; --accent-soft:#e8efff; --ai:#7c3aed; --ai-soft:#f3edff; --danger:#d92d20; --ok:#12805c;
  --radius:12px; --shadow:0 8px 30px rgba(16,24,40,.12);
  color-scheme:light;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#0f1115; --panel:#161a20; --text:#e6e8eb; --muted:#9aa3af; --line:#262b33; --hover:#1d222a;
    --accent:#6b9bff; --accent-soft:#1a2540; --ai:#b794ff; --ai-soft:#251d3a; --danger:#ff6b5e; --shadow:0 8px 30px rgba(0,0,0,.5);
    color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --bg:#0f1115; --panel:#161a20; --text:#e6e8eb; --muted:#9aa3af; --line:#262b33; --hover:#1d222a;
  --accent:#6b9bff; --accent-soft:#1a2540; --ai:#b794ff; --ai-soft:#251d3a; --danger:#ff6b5e; --shadow:0 8px 30px rgba(0,0,0,.5);
  color-scheme:dark;
}
*{box-sizing:border-box}
html,body{margin:0;height:100%;background:var(--bg);color:var(--text);font:15px/1.45 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased}
#app{height:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit}
.icon{flex:none;vertical-align:middle}
.muted{color:var(--muted)} .small{font-size:12.5px} .grow{flex:1;min-width:0}
.input{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:10px;background:var(--panel);color:var(--text);font:inherit;outline:none}
.input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
textarea.input{resize:vertical}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:9px 14px;border-radius:10px;border:1px solid var(--line);background:var(--panel);cursor:pointer;font-weight:500;white-space:nowrap}
.btn:hover{background:var(--hover)} .btn:disabled{opacity:.6;cursor:default}
.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff} .btn.primary:hover{filter:brightness(1.07)}
.btn.danger{background:var(--danger);border-color:var(--danger);color:#fff}
.btn.ghost{background:transparent;border-color:transparent} .btn.ghost:hover{background:var(--hover)}
.btn.sm{padding:5px 10px;font-size:13.5px} .btn.block{width:100%}
.icon-btn{display:inline-grid;place-items:center;width:38px;height:38px;border:0;border-radius:10px;background:transparent;cursor:pointer;color:var(--muted)}
.icon-btn:hover{background:var(--hover);color:var(--text)}
.link-btn{border:0;background:none;color:var(--accent);cursor:pointer;padding:0}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:18px}
.spinner{width:26px;height:26px;border:3px solid var(--line);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.splash,.loading{display:grid;place-items:center;padding:40px;gap:8px}
.splash{height:100%}
.error{color:var(--danger);font-size:14px}
.notice{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin:10px 0;padding:10px 12px;border-radius:10px;background:var(--hover);font-size:14px}
.avatar{--h:210;flex:none;display:grid;place-items:center;width:38px;height:38px;border-radius:50%;background:hsl(var(--h) 60% 92%);color:hsl(var(--h) 45% 32%);font-weight:600;font-size:14px}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]) .avatar{background:hsl(var(--h) 30% 24%);color:hsl(var(--h) 70% 82%)}}
:root[data-theme="dark"] .avatar{background:hsl(var(--h) 30% 24%);color:hsl(var(--h) 70% 82%)}
.avatar.sm{width:26px;height:26px;font-size:12px}

/* login */
.login-wrap{min-height:100%;display:grid;place-items:center;padding:16px}
.login{width:100%;max-width:380px;display:grid;gap:14px;padding:28px}
.login h1{margin:0 0 4px;font-size:22px;text-align:center}
.login label{display:grid;gap:6px;font-size:13.5px;color:var(--muted)}
.login .code{letter-spacing:.35em;font-size:20px;text-align:center}
.login-logo{justify-self:center;display:grid;place-items:center;width:56px;height:56px;border-radius:16px;background:var(--accent);color:#fff}

/* shell */
.shell{display:grid;grid-template-columns:260px minmax(320px,420px) 1fr;height:100%}
.bar{display:flex;align-items:center;gap:6px;min-height:56px;padding:8px 10px;padding-top:max(8px,env(safe-area-inset-top));border-bottom:1px solid var(--line);background:var(--panel);position:sticky;top:0;z-index:2}
.bar h2{margin:0 6px;font-size:17px;flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.drawer-panel{height:100%;overflow:auto;padding:12px 10px;background:var(--bg);border-right:1px solid var(--line);display:flex;flex-direction:column;gap:2px;padding-top:max(12px,env(safe-area-inset-top))}
.drawer-scrim{display:none}
.accounts{display:grid;gap:2px;margin-bottom:10px}
.account{display:flex;align-items:center;gap:8px;padding:7px 8px;border-radius:10px;font-size:13.5px;color:var(--muted)}
.account.active{background:var(--panel);color:var(--text);font-weight:600;box-shadow:0 0 0 1px var(--line)}
.compose-btn{margin:4px 0 12px}
.folder{display:flex;align-items:center;gap:10px;padding:8px 10px;border-radius:10px;color:var(--text);font-size:14.5px}
.folder span{flex:1;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.folder:hover{background:var(--hover)} .folder.active{background:var(--accent-soft);color:var(--accent);font-weight:600}
.folder .icon{color:var(--muted)} .folder.active .icon{color:var(--accent)}
.count{font-size:12px;color:var(--accent);font-weight:700}
.group-label{margin:14px 10px 4px;font-size:11.5px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.settings-link{margin-top:auto}

.list-pane{display:flex;flex-direction:column;min-width:0;height:100%;background:var(--panel);border-right:1px solid var(--line);position:relative}
.list{flex:1;overflow:auto;padding-bottom:90px}
.search{display:flex;flex:1;gap:4px}
.row{display:flex;gap:12px;padding:12px 14px;border-bottom:1px solid var(--line);position:relative;cursor:pointer}
.row:hover{background:var(--hover)} .row.active{background:var(--accent-soft)}
.row-main{flex:1;min-width:0}
.row-top{display:flex;gap:8px;align-items:baseline}
.from{flex:1;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.date{font-size:12.5px;color:var(--muted);flex:none}
.subject{display:flex;gap:4px;align-items:center;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-size:14px}
.summary{margin-top:2px;font-size:13.5px;color:var(--muted)}
.summary.ai .icon{color:var(--ai);margin-right:4px;vertical-align:-2px}
.summary .pending{opacity:.75}
.row.unread .from,.row.unread .subject{font-weight:650}
.row.unread::before{content:"";position:absolute;left:4px;top:50%;width:6px;height:6px;margin-top:-3px;border-radius:50%;background:var(--accent)}
.row-action{position:absolute;right:8px;bottom:8px;opacity:0;background:var(--panel)}
.row:hover .row-action{opacity:1}
.empty-list,.empty-reader{display:grid;place-items:center;gap:6px;padding:60px 20px;color:var(--muted)}
.empty-reader{height:100%}
.fab{position:absolute;right:18px;bottom:max(18px,env(safe-area-inset-bottom));display:grid;place-items:center;width:56px;height:56px;border-radius:18px;background:var(--accent);color:#fff;box-shadow:var(--shadow)}

.reader-pane{min-width:0;height:100%;overflow:hidden;background:var(--panel)}
.reader{height:100%;display:flex;flex-direction:column}
.reader-body{flex:1;overflow:auto;padding:16px 20px 40px;max-width:900px;width:100%;margin:0 auto}
.picker{display:flex;flex-wrap:wrap;gap:6px;padding:10px 14px;border-bottom:1px solid var(--line);background:var(--bg)}
.chip{border:1px solid var(--line);background:var(--panel);border-radius:999px;padding:6px 12px;cursor:pointer;font-size:13.5px}
.chip:hover{border-color:var(--accent);color:var(--accent)}
.suggest{display:flex;align-items:center;gap:10px;padding:10px 12px;margin-bottom:14px;border-radius:12px;background:var(--ai-soft);color:var(--text);font-size:14px}
.suggest .icon{color:var(--ai)} .suggest span{flex:1}
.suggest.muted{color:var(--muted)}
.msg-subject{font-size:21px;margin:4px 0 6px;line-height:1.3}
.msg-summary{margin:0 0 14px;color:var(--muted);font-size:14px}
.msg-summary .icon{color:var(--ai);vertical-align:-2px}
.msg-head{display:flex;gap:12px;align-items:flex-start;margin-bottom:12px}
.msg-frame{width:100%;min-height:120px;border:0;background:#fff;border-radius:8px;display:block}
.atts{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0}
.att{display:flex;align-items:center;gap:8px;max-width:100%;padding:8px 10px;border:1px solid var(--line);border-radius:10px;background:var(--panel);font-size:13.5px}
.att-name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:240px}
a.att:hover{border-color:var(--accent)}
.reply-bar{display:flex;gap:8px;flex-wrap:wrap;margin-top:18px}

/* compose */
.compose-page,.settings-page{height:100%;display:flex;flex-direction:column;background:var(--panel)}
.compose-main{flex:1;display:flex;min-height:0}
.compose{flex:1;overflow:auto;padding:4px 20px 40px;max-width:900px;margin:0 auto;width:100%}
.rcpt{display:flex;align-items:flex-start;gap:10px;padding:8px 0;border-bottom:1px solid var(--line)}
.rcpt-label{width:44px;flex:none;color:var(--muted);padding-top:5px;font-size:14px}
.from-row span:last-child{padding-top:5px}
.rcpt-box{flex:1;display:flex;flex-wrap:wrap;gap:6px;position:relative;min-width:0}
.rcpt-input{flex:1;min-width:140px;border:0;outline:none;background:transparent;color:var(--text);font:inherit;padding:5px 0}
.pill{display:inline-flex;align-items:center;gap:4px;padding:3px 4px 3px 10px;border-radius:999px;background:var(--accent-soft);color:var(--accent);font-size:13.5px;max-width:100%}
.pill button{border:0;background:none;cursor:pointer;color:inherit;display:grid;place-items:center;padding:2px;border-radius:50%}
.sugg{position:absolute;top:100%;left:0;right:0;z-index:5;background:var(--panel);border:1px solid var(--line);border-radius:10px;box-shadow:var(--shadow);overflow:hidden}
.sugg button{display:block;width:100%;text-align:left;padding:9px 12px;border:0;background:none;cursor:pointer}
.sugg button:hover{background:var(--hover)}
.cc-toggle{margin:8px 0 0 54px;font-size:13.5px}
.subject-input{width:100%;border:0;border-bottom:1px solid var(--line);padding:12px 0;font:inherit;font-size:16px;font-weight:600;outline:none;background:transparent;color:var(--text)}
.toolbar{display:flex;align-items:center;gap:2px;padding:6px 0;border-bottom:1px solid var(--line);position:sticky;top:0;background:var(--panel);z-index:1}
.ai-btn{border-color:transparent;background:var(--ai-soft);color:var(--ai)}
.editor{min-height:260px;padding:14px 0;outline:none;line-height:1.55}
.editor blockquote{margin:0 0 0 .6em;padding-left:.8em;border-left:3px solid var(--line);color:var(--muted)}
.editor img{max-width:100%}
.advice{width:340px;flex:none;border-left:1px solid var(--line);background:var(--bg);overflow:auto;padding:14px;display:flex;flex-direction:column;gap:10px}
.advice-head{display:flex;align-items:center;gap:8px}
.advice-head .icon{color:var(--ai)}
.sug{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:12px;display:grid;gap:6px}
.sug-old{text-decoration:line-through;color:var(--danger);font-size:14px}
.sug-new{color:var(--ok);font-weight:500;font-size:14px}
.sug-actions{display:flex;gap:6px}

/* settings */
.settings{overflow:auto;padding:16px;display:grid;gap:14px;max-width:720px;width:100%;margin:0 auto;align-content:start}
.settings h3{display:flex;align-items:center;gap:8px;margin:0 0 12px;font-size:16px}
.settings fieldset{border:0;padding:0;margin:0 0 14px;display:grid;gap:10px}
.settings legend{font-weight:600;margin-bottom:8px}
.settings label{display:grid;gap:6px;font-size:13.5px;color:var(--muted)}
.session{display:flex;align-items:center;gap:10px;padding:10px 0;border-top:1px solid var(--line)}
.tag{font-size:11.5px;background:var(--accent-soft);color:var(--accent);border-radius:999px;padding:2px 8px}
.switch-row{display:flex !important;align-items:center;justify-content:space-between;gap:12px;color:var(--text) !important}
.switch{appearance:none;width:46px;height:28px;border-radius:999px;background:var(--line);position:relative;cursor:pointer;transition:background .2s;flex:none}
.switch::after{content:"";position:absolute;top:3px;left:3px;width:22px;height:22px;border-radius:50%;background:#fff;transition:transform .2s;box-shadow:0 1px 3px rgba(0,0,0,.2)}
.switch:checked{background:var(--accent)} .switch:checked::after{transform:translateX(18px)}
.seg{display:inline-flex;border:1px solid var(--line);border-radius:10px;overflow:hidden}
.seg button{border:0;background:var(--panel);padding:8px 16px;cursor:pointer}
.seg button.on{background:var(--accent);color:#fff}

/* dialogs & toasts */
.overlay{position:fixed;inset:0;background:rgba(15,17,21,.45);display:grid;place-items:center;padding:16px;z-index:50}
.dialog{width:100%;max-width:400px;background:var(--panel);border-radius:16px;padding:20px;box-shadow:var(--shadow);display:grid;gap:12px}
.dialog h3{margin:0;font-size:17px} .dialog p{margin:0;color:var(--muted)}
.dialog-actions{display:flex;justify-content:flex-end;gap:8px}
.toasts{position:fixed;left:50%;bottom:max(24px,env(safe-area-inset-bottom));transform:translateX(-50%);display:grid;gap:8px;z-index:60;width:max-content;max-width:calc(100% - 32px)}
.toast{background:#1f2328;color:#fff;padding:10px 16px;border-radius:12px;box-shadow:var(--shadow);font-size:14px;text-align:center}
.toast.error{background:var(--danger)}

.only-mobile{display:none}

/* tablet: hide reader until a message is open */
@media (max-width:1100px){
  .shell{grid-template-columns:240px 1fr}
  .reader-pane{display:none}
  .shell.has-reader .list-pane{display:none}
  .shell.has-reader .reader-pane{display:block}
}
/* phone */
@media (max-width:760px){
  .only-mobile{display:inline-grid}
  .shell{grid-template-columns:1fr}
  .drawer{position:fixed;inset:0;z-index:20;pointer-events:none}
  .drawer-scrim{display:block;position:absolute;inset:0;background:rgba(15,17,21,.4);opacity:0;transition:opacity .2s}
  .drawer-panel{position:absolute;top:0;bottom:0;left:0;width:min(300px,85vw);transform:translateX(-100%);transition:transform .22s ease;box-shadow:var(--shadow)}
  .drawer.open{pointer-events:auto} .drawer.open .drawer-scrim{opacity:1} .drawer.open .drawer-panel{transform:none}
  .row-action{display:none}
  .reader-body{padding:14px 16px 40px}
  .compose{padding:4px 16px 40px}
  .compose-main{flex-direction:column}
  .advice{width:auto;border-left:0;border-top:1px solid var(--line);max-height:50vh}
  .reply-bar .btn{flex:1}
}

.qr{justify-self:center;border-radius:8px;background:#fff;padding:6px}
.codes{background:var(--hover);border-radius:10px;padding:12px;font-size:15px;line-height:1.7;text-align:center;user-select:all}
.login p{margin:0}

/* ---- portal shell (2026-11-04) */
.portal{display:grid;grid-template-columns:76px 1fr;height:100%}
.rail{display:flex;flex-direction:column;align-items:stretch;gap:4px;padding:12px 8px;padding-top:max(12px,env(safe-area-inset-top));background:var(--panel);border-right:1px solid var(--line);z-index:30}
.rail-logo{display:grid;place-items:center;height:40px;margin:0 4px 10px;border-radius:12px;background:var(--accent);color:#fff;font-weight:800;font-size:13px;letter-spacing:.06em}
.rail-item{display:flex;flex-direction:column;align-items:center;gap:3px;padding:8px 2px;border-radius:12px;color:var(--muted);font-size:11px;font-weight:600;text-align:center}
.rail-item:hover{background:var(--hover);color:var(--text)}
.rail-item.active{background:var(--accent-soft);color:var(--accent)}
.rail-item:last-child{margin-top:auto}
.portal-main{min-width:0;height:100%;overflow:hidden;position:relative}
.portal-main > .shell,.portal-main > .compose-page,.portal-main > .settings-page,.portal-main > .page{height:100%}
.page{display:flex;flex-direction:column;background:var(--panel)}
.page-body{flex:1;overflow:auto;padding:16px;max-width:900px;width:100%;margin:0 auto}
.login-logo{font-weight:800;font-size:15px;letter-spacing:.06em}

.home{height:100%;overflow:auto;padding:28px 24px 100px;max-width:1000px;margin:0 auto}
.home-head h1{margin:0;font-size:26px}
.home-head p{margin:4px 0 24px;text-transform:capitalize}
.tiles{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px}
.tile{display:grid;gap:6px;align-content:start;padding:18px;border:1px solid var(--line);border-radius:16px;background:var(--panel);transition:border-color .15s,box-shadow .15s}
.tile:hover{border-color:var(--accent);box-shadow:var(--shadow)}
.tile h2{margin:4px 0 0;font-size:17px}
.tile p{margin:0;font-size:14px}
.tile-icon{display:grid;place-items:center;width:44px;height:44px;border-radius:12px;background:var(--accent-soft);color:var(--accent)}

.noaccess{height:100%;display:grid;place-items:center;align-content:center;gap:10px;padding:24px;text-align:center;color:var(--muted)}
.noaccess h1{margin:0;color:var(--text);font-size:22px}
.noaccess p{margin:0 0 8px;max-width:360px}

.admin .bar{justify-content:space-between}
.user-list{display:grid;gap:10px}
.user{display:flex;gap:12px;align-items:flex-start;flex-wrap:wrap}
.user.disabled{opacity:.6}
.user-actions{display:flex;flex-wrap:wrap;gap:4px;justify-content:flex-end}
.chips{display:flex;flex-wrap:wrap;gap:6px;margin-top:6px}
.chip.static{cursor:default;padding:3px 10px;font-size:12.5px;background:var(--accent-soft);border-color:transparent;color:var(--accent)}
.tag.danger{background:#fde8e7;color:var(--danger)} .tag.warn{background:#fff4e0;color:#b45309}
.field{display:grid;gap:6px;font-size:13.5px;color:var(--muted)}
.checks{display:flex;flex-wrap:wrap;gap:8px}
.check{display:flex;align-items:center;gap:8px;padding:8px 12px;border:1px solid var(--line);border-radius:10px;color:var(--text);cursor:pointer;font-size:14.5px}
.check input{accent-color:var(--accent);width:16px;height:16px}

@media (max-width:1100px){ .portal-main > .shell{grid-template-columns:240px 1fr} }
@media (max-width:760px){
  .portal{grid-template-columns:1fr;grid-template-rows:1fr auto}
  .rail{grid-row:2;flex-direction:row;justify-content:space-around;gap:0;padding:6px 4px;padding-bottom:max(6px,env(safe-area-inset-bottom));border-right:0;border-top:1px solid var(--line)}
  .rail-logo{display:none}
  .rail-item{flex:1;padding:6px 0;font-size:10.5px}
  .rail-item:last-child{margin-top:0}
  .portal-main{grid-row:1}
  .portal-main > .shell{grid-template-columns:1fr}
  .drawer-panel{padding-bottom:80px}
  .home{padding:20px 16px 40px}
  .user-actions{justify-content:flex-start;width:100%}
}